EP0332265B1 - Machine de bureau, en particulier imprimante - Google Patents

Machine de bureau, en particulier imprimante Download PDF

Info

Publication number
EP0332265B1
EP0332265B1 EP89200537A EP89200537A EP0332265B1 EP 0332265 B1 EP0332265 B1 EP 0332265B1 EP 89200537 A EP89200537 A EP 89200537A EP 89200537 A EP89200537 A EP 89200537A EP 0332265 B1 EP0332265 B1 EP 0332265B1
Authority
EP
European Patent Office
Prior art keywords
rollers
tractor
pressure rollers
pair
stop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89200537A
Other languages
German (de)
English (en)
Other versions
EP0332265A3 (en
EP0332265A2 (fr
Inventor
Manfred Rosenthal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0332265A2 publication Critical patent/EP0332265A2/fr
Publication of EP0332265A3 publication Critical patent/EP0332265A3/de
Application granted granted Critical
Publication of EP0332265B1 publication Critical patent/EP0332265B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/48—Apparatus for condensed record, tally strip, or like work using two or more papers, or sets of papers, e.g. devices for switching over from handling of copy material in sheet form to handling of copy material in continuous form and vice versa or point-of-sale printers comprising means for printing on continuous copy material, e.g. journal for tills, and on single sheets, e.g. cheques or receipts

Definitions

  • the invention relates to an office machine, e.g. B. on a printer, with a printing unit, with a single paper transport via a first pair of rollers in front and a second behind the printing unit and with an endless paper transport via a tractor.
  • Such an office machine designed as a printer is such. B. become known from EP 0 197 340 A2.
  • the known printer has a pair of rollers each with a drive roller and a pressure roller in the direction of flow of the paper in front of and behind the printing unit.
  • a tractor is provided for the transport of continuous paper, which essentially has a straight paper track, the tractor operating in overrun mode.
  • the pressure rollers of one pair of rollers lying in front of the printing unit are opened.
  • the tractor is pivoted so that single sheets can now be guided over both pairs of rollers, both pressure rollers being pressed against the corresponding drive rollers.
  • the invention has for its object to design an office machine of the type mentioned in such a way that the pressure rollers of the roller pairs which are no longer required when the tractor is switched from overrun to pull operation can be opened in a simple manner or can be released from their drive rollers.
  • This object is achieved in that the tractor can be pivoted from a push position into a pull position and has two stops, that the pressure rollers of the first pair of rollers can be released by the action of the first stop when the tractor is pivoted into the pull position, and that the pressure rollers arranged on a housing pivot part of the second pair of rollers when the housing pivoting part is closed can be released by the second stop projecting in the pulling position.
  • the aforementioned pressure rollers are automatically released from their respective drive rollers by simple adjustment of the tractor, so that the path for the continuous paper to be processed in the pull position can no longer be blocked by the pressure rollers.
  • the automatic opening is carried out by two stops, the first of which acts upon the first pair of rollers when the tractor is pivoted and the second acts upon the second pair of rollers after the tractor has been pivoted in the sense of opening or releasing the respective drive rollers.
  • the first stop acts on a lever mechanism with a rod which is connected at one end to the pressure rollers of the first pair of rollers via a one-armed rotary lever these are opened or closed during a longitudinal movement, and which is articulated at its other end to a lever arm of a two-armed rotary lever, the free lever arm of which has a curved engagement surface for engaging the first tractor stop.
  • the engagement of the first stop over the curved contact surface causes a smooth and reliable actuation of the lever mechanism.
  • the one-armed rotary lever has a flattened rotary shaft on one end of the rod, on which a leaf spring rests under pressure, the free end of the leaf spring acting on the bearing of the pressure rollers in such a way that when the leaf spring rests on it Circumference of the rotary shaft is open and pressed against the flattened part.
  • An automatic return to the starting position takes place in that the rod of the lever gear is pulled into its starting position by a spring in the pushing position of the tractor.
  • a simple way of opening the pressure rollers of the second pair of rollers results from the fact that these pressure rollers are arranged resiliently on a carrier which is designed as a paper tail unit in the tractor pushing position and is in turn rotatably mounted on the housing pivot part and which, when the housing pivot part is open, counteracts a tension spring a projection of the housing pivot part is pressed.
  • the housing swivel part is pivotally mounted in the side walls of the housing of the office machine and, in the opened, ie swiveled-up state, enables perfect access to the Tractor.
  • the pressure rollers of the second pair of rollers can be resilient on the upper guide flap of the paper tail unit, e.g. B. be supported by a leaf spring to maintain a uniform pressure in the closed state.
  • the printer has, as a central component, a printing unit 10 with a printing roller 11 mounted in the side walls of the housing.
  • 12 is the tractor for the transport of continuous paper, which is rotatably mounted in the housing walls by means of pins 13 and can assume two lockable end positions.
  • the first position is the push position according to FIGS. 1 and 2 and the second the pull position according to FIG. 3.
  • a housing pivoting part which is rotatable at the pivot point 15 of the housing walls and which facilitates access to the tractor 12 when folded up is designated by 14.
  • the swivel part 14 carries a switch 17 which can be rotated at point 16. This adjustable switch serves together with a pair of rollers 18 for deflecting individual paper or continuous paper which is conveyed by the printing unit 10.
  • 19 denotes a pair of rollers lying in front of the printing unit 10 and 20 denotes a pair of rollers behind the printing unit 10, 19a, 20a being the drive rollers and 19b, 20b being the pressure rollers.
  • the pressure rollers 20b are seated on a support 21 designed as a paper tail unit, which is rotatably mounted in the swivel part 14 via 22 and is pressed by a tension spring 23 against a projection 24 of the swivel part 14 when the swivel part 14 is swiveled up.
  • continuous paper 25 can be fed from behind by the tractor 12.
  • the continuous paper 25 runs over the pressure roller 11, is thereby curved and is conveyed upward over the pair of rollers 20, the paper tail unit 21 and the pair of rollers 18.
  • all drive rollers of the roller pairs 18, 19, 20 are in operation with the pressure rollers pressed on.
  • individual papers 26 can thus also be guided over the roller pairs 19, 20 and 18 when the tractor 12 is out of operation for conveying the continuous paper 25.
  • the tractor 12 has been pivoted into its pull position by pivoting in the direction 27.
  • the continuous paper 28 fed from the front is pulled by the tractor 12 and leaves the printer at its rear.
  • the pressure rollers 19b, 20b must be opened, ie they must be released from the respective drive rollers 19a, 20a, so that the traction movement of the tractor is not hindered.
  • the pressure rollers 19b are released in that when the tractor 12 is pivoted up, a first stop 29 of the tractor 12 acts on the pressure rollers 19b via a lever linkage 30.
  • a rod 31 is articulated at one end to a two-armed lever 32 which is mounted in the housing via 33 and has a curved engagement surface 34 for engaging the stop 29 on the free lever arm 32a.
  • the stop 29 slides on the surface 34, so that the rod 31 is deflected in the direction 31b against the force of a spring 31a.
  • a one-armed lever 35 which has a flattened shaft 36 is mounted in the housing.
  • a leaf spring 37 abuts either the circular circumference or the flattened point 36a when the lever 35 rotates. 1 and 2, the leaf spring 37 lies on the flattened portion 36a and thus presses the pressure rollers 19b against the drive rollers 19a. 3, the leaf spring 37 is raised by rotation of the lever 35, so that the pressure rollers 19b are released.
  • the pressure rollers 20b located behind the printing unit 10 are released from the associated drive rollers 20a by first moving the tractor 12 in the direction 27 into the pull position shown in FIG. 3 when the housing pivoting part 14 (FIG. 2) is pivoted up.
  • a second stop 38 attached to the tractor 12 is brought into the movement path of the swivel part 14 in such a way that when it swivels down, the paper tail 21 rotatable on the swivel part 14 with the pressure rollers 20b attached to it is raised by this stop 38, as a result of which the pressure rollers 20b are lifted from the Drive rollers 20a are released.
  • This also clears the way for the transport of the continuous paper 24, since the paper tail 21 is pivoted out of the path of the continuous paper 28 by the rotary movement.
  • a simple design of the tractor with two cleverly arranged stops means that the pressure rollers required in the pushing position of the tractor can be released by simply pivoting the tractor up into the pulling position.
  • a paper guide can be used be removed from the area of the paper run during train operation. The release of the pressure rollers on the one hand and, if necessary, the change in the paper guidance is thus carried out automatically by the adjustment of the tractor, without any additional components having to be added or removed. This is achieved only through a clever and well thought-out interaction between the stops of the tractor on the one hand and the pressure rollers on the other.

Landscapes

  • Handling Of Sheets (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)

Claims (7)

  1. Machine de bureau, par exemple imprimante, avec un mécanisme d'impression, un transport de feuilles de papier individuelles par une première paire de rouleaux située en amont et une seconde paire de rouleaux située en aval du mécanisme d'impression, et avec un transport de papier continu par un entraîneur, caractérisée en ce que l'entraîneur (12) peut pivoter depuis une position de poussée vers une position de traction et présente deux butées (29, 38), que les rouleaux de pression (19b) de la première paire de rouleaux (19) peuvent être libérés par l'action de la première butée (29) lors du pivotement de l'entraîneur (12) dans sa position de traction, et que les rouleaux de pression (20b) de la seconde paire de rouleaux (20), installés sur une partie pivotante (14) du boîtier, peuvent être libérés lors de la fermeture de cette partie pivotante (14) du boîtier par la seconde butée (38) qui fait saillie dans la position de traction.
  2. Machine de bureau selon la revendication 1, caractérisée en ce que la première butée (29) agit sur un mécanisme de levier (30) comportant une barre (31) qui, à une de ses extrémités, est reliée par l'intermédiaire d'un levier pivotant (35) à bras unique aux rouleaux de pression (19b) de la première paire de rouleaux (19) de sorte que ces rouleaux de pression (19b) sont ouverts ou fermés lors d'un déplacement longitudinal, et qui, à son autre extrémité, est articulée à un bras de levier (32b) d'un levier pivotant (32) à deux bras, dont le bras libre (32a) présente une surface d'attaque (34) courbe destinée à venir en contact avec la première butée (29) de l'entraîneur.
  3. Machine de bureau selon la revendicaton 2, caractérisée en ce que le levier pivotant (35) à bras unique présente un arbre de rotation (36) à méplat, sur lequel une lame de ressort (37) appuie sous pression, et l'extrémité libre de la lame de ressort (37) agit sur le palier des rouleaux de pression (19b) de sorte que ces rouleaux de pression (19b) sont écartés lorsque la lame de ressort (37) appuie sur la surface périphérique circulaire de l'arbre de rotation (36) et sont pressés lorsque cette lame de ressort (37) appuie sur le méplat (36a).
  4. Machine de bureau selon la revendication 2 ou 3, caractérisée en ce que la barre (31) du mécanisme de levier (30) pivote en opposition à la sollicitation d'un ressort (31a) lorsque la butée (29) vient en contact avec la surface d'attaque (34).
  5. Machine de bureau selon la revendication 1, caractérisée en ce que les rouleaux de pression (20b) de la seconde paire de rouleaux (20) sont montés élastiquement sur un support (21) qui, lorsque l'entraîneur est en position de poussée, se présente sous la forme d'un mécanisme (21) de guidage du papier et est monté à pivotement en (22) sur la partie pivotante (14) du boîtier, et qui, lorsque la partie pivotante (14) du boîtier est ouverte, est rappelé par un ressort de traction (23) contre une saillie (24) de la partie pivotante (14) du boîter.
  6. Machine de bureau selon la revendicaton 5, caractérisée en ce que, lorsque la partie pivotante (14) du boîter est fermée et que l'entraîneur (12) est en position de traction, le support (21) avec les rouleaux de pression (20b) pivote, à l'intervention de la seconde butée (38) de l'entraîneur en opposition à la force du ressort de traction (23) de sorte que les rouleaux de pression (20b) sont soulevés et que, dans le mode de traction, le mécanisme (21) de guidage du papier est écarté du parcours de transport du papier continu.
  7. Machine de bureau selon la revendicaton 5 ou 6, caractérisée en ce que les rouleaux de pression (20b) de la seconde paire de rouleaux (20) sont maintenus élastiquement par une lame de ressort (21b) sur la plaque supérieure de guidage (21a) du mécanisme (21) de guidage du papier.
EP89200537A 1988-03-10 1989-03-06 Machine de bureau, en particulier imprimante Expired - Lifetime EP0332265B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3807809 1988-03-10
DE3807809A DE3807809A1 (de) 1988-03-10 1988-03-10 Bueromaschine, z. b. drucker

Publications (3)

Publication Number Publication Date
EP0332265A2 EP0332265A2 (fr) 1989-09-13
EP0332265A3 EP0332265A3 (en) 1990-05-02
EP0332265B1 true EP0332265B1 (fr) 1993-03-17

Family

ID=6349279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89200537A Expired - Lifetime EP0332265B1 (fr) 1988-03-10 1989-03-06 Machine de bureau, en particulier imprimante

Country Status (4)

Country Link
US (1) US4995746A (fr)
EP (1) EP0332265B1 (fr)
JP (1) JPH01275083A (fr)
DE (2) DE3807809A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5083880A (en) * 1989-07-19 1992-01-28 Fujitsu Limited Printing media feeding apparatus for printers
US5324124A (en) * 1993-01-28 1994-06-28 International Business Machines Corporation Guide system for feed roll entry
JP2852337B2 (ja) * 1994-12-19 1999-02-03 セイコープレシジョン株式会社 プリンタ
DE19605262C2 (de) * 1995-02-07 1999-03-18 Seiko Epson Corp Drucker mit einem Gehäuse und einer daran angeordneten Zuführeinrichtung und einer Ausgabeeinrichtung für Einzelblätter
EP0752320B1 (fr) * 1995-07-07 1999-01-27 COMPUPRINT S.p.A. Imprimante avec système de traitement de plusieurs feuilles continues
EP0771666B1 (fr) * 1995-11-06 2001-10-17 Fujitsu Limited Imprimante de type multivoies

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3644930A (en) * 1969-06-02 1972-02-22 Xerox Corp Multistylus recorder
US3722655A (en) * 1970-11-09 1973-03-27 Ibm Semi automatic form loading for printers
CH617636A5 (en) * 1977-06-02 1980-06-13 Grapha Holding Ag Delivery device
US4224626A (en) * 1978-10-10 1980-09-23 The United States Of America As Represented By The Secretary Of The Navy Ellipticized lens providing balanced astigmatism
US4360279A (en) * 1980-07-02 1982-11-23 Brother Kogyo Kabushiki Kaisha Printing paper feeding mechanism
JPS6316531Y2 (fr) * 1981-06-19 1988-05-11
DE3214549C2 (de) * 1982-04-20 1985-01-17 Siemens AG, 1000 Berlin und 8000 München Transportvorrichtung für randgelochtes Faltpapier und für Rollenpapier
DE3226510C2 (de) * 1982-07-15 1984-07-12 Siemens AG, 1000 Berlin und 8000 München Universelle Papiertransporteinrichtung für Einzelblätter und Endlospapier in Zeilendruckeinrichtungen
JPS5948352A (ja) * 1982-09-08 1984-03-19 Toshiba Corp 紙葉類振分装置
JPS59185670A (ja) * 1983-04-07 1984-10-22 Konishiroku Photo Ind Co Ltd プリンタの用紙搬送装置
JPS6083868A (ja) * 1983-10-17 1985-05-13 Nec Corp プリンタ
US4663722A (en) * 1983-11-26 1987-05-05 Tokyo Electric Co., Ltd. Automatic paper feed control apparatus for a printing device
JPS60161175A (ja) * 1984-01-31 1985-08-22 Tokyo Electric Co Ltd 印字機の紙送り装置
JPS60172567A (ja) * 1984-02-20 1985-09-06 Canon Electronics Inc 紙送り装置
IT1196758B (it) * 1984-11-19 1988-11-25 Olivetti & Co Spa Alimentatore di supporti di stampa per una macchina per scrivere o simili macchine da ufficio
EP0191984B1 (fr) * 1984-12-14 1989-08-02 Tokyo Electric Co., Ltd. Dispositif d'entraînement du papier dans une imprimante
JPH0615248B2 (ja) * 1985-04-12 1994-03-02 インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション 印字装置
JPS6297871A (ja) * 1985-10-23 1987-05-07 Ricoh Co Ltd 印字装置
US4806036A (en) * 1985-11-12 1989-02-21 Genicom Corporation Printer mechanism carried by upper portion of hinged housing
JPS62134280A (ja) * 1985-12-06 1987-06-17 Ricoh Co Ltd 印字装置の紙送り機構
JPS62233275A (ja) * 1986-04-03 1987-10-13 Seiko Epson Corp プリンタの紙送り機構
US4830527A (en) * 1986-10-24 1989-05-16 Oki Electric Industry Co., Ltd. Printer with improved pinch roller actuating mechanism
JPH0671807B2 (ja) * 1986-11-10 1994-09-14 ブラザー工業株式会社 印字装置
JP2567236B2 (ja) * 1987-03-02 1996-12-25 セイコープレシジョン株式会社 記録紙正逆送り装置

Also Published As

Publication number Publication date
US4995746A (en) 1991-02-26
EP0332265A3 (en) 1990-05-02
DE3807809A1 (de) 1989-09-21
JPH01275083A (ja) 1989-11-02
DE58903764D1 (de) 1993-04-22
EP0332265A2 (fr) 1989-09-13

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